本文整理汇总了Java中org.apache.cassandra.db.ConsistencyLevel.validateForRead方法的典型用法代码示例。如果您正苦于以下问题：Java ConsistencyLevel.validateForRead方法的具体用法？Java ConsistencyLevel.validateForRead怎么用？Java ConsistencyLevel.validateForRead使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.cassandra.db.ConsistencyLevel的用法示例。
在下文中一共展示了ConsistencyLevel.validateForRead方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: execute
import org.apache.cassandra.db.ConsistencyLevel; //导入方法依赖的package包/类
public ResultMessage.Rows execute(QueryState state, QueryOptions options) throws RequestExecutionException, RequestValidationException
{
ConsistencyLevel cl = options.getConsistency();
if (cl == null)
throw new InvalidRequestException("Invalid empty consistency level");
cl.validateForRead(keyspace());
int limit = getLimit(options);
long now = System.currentTimeMillis();
Pageable command = getPageableCommand(options, limit, now);
int pageSize = options.getPageSize();
// A count query will never be paged for the user, but we always page it internally to avoid OOM.
// If we user provided a pageSize we'll use that to page internally (because why not), otherwise we use our default
// Note that if there are some nodes in the cluster with a version less than 2.0, we can't use paging (CASSANDRA-6707).
if (parameters.isCount && pageSize <= 0)
pageSize = DEFAULT_COUNT_PAGE_SIZE;
if (pageSize <= 0 || command == null || !QueryPagers.mayNeedPaging(command, pageSize))
{
return execute(command, options, limit, now, state);
}
else
{
QueryPager pager = QueryPagers.pager(command, cl, state.getClientState(), options.getPagingState());
if (parameters.isCount)
return pageCountQuery(pager, options, pageSize, now, limit);
// We can't properly do post-query ordering if we page (see #6722)
if (needsPostQueryOrdering())
throw new InvalidRequestException("Cannot page queries with both ORDER BY and a IN restriction on the partition key; you must either remove the "
+ "ORDER BY or the IN and sort client side, or disable paging for this query");
List<Row> page = pager.fetchPage(pageSize);
ResultMessage.Rows msg = processResults(page, options, limit, now);
if (!pager.isExhausted())
msg.result.metadata.setHasMorePages(pager.state());
return msg;
}
}
示例2: execute
import org.apache.cassandra.db.ConsistencyLevel; //导入方法依赖的package包/类
public ResultMessage.Rows execute(QueryState state, QueryOptions options) throws RequestExecutionException, RequestValidationException
{
ConsistencyLevel cl = options.getConsistency();
List<ByteBuffer> variables = options.getValues();
if (cl == null)
throw new InvalidRequestException("Invalid empty consistency level");
cl.validateForRead(keyspace());
int limit = getLimit(variables);
long now = System.currentTimeMillis();
Pageable command;
if (isKeyRange || usesSecondaryIndexing)
{
command = getRangeCommand(variables, limit, now);
}
else
{
List<ReadCommand> commands = getSliceCommands(variables, limit, now);
command = commands == null ? null : new Pageable.ReadCommands(commands);
}
int pageSize = options.getPageSize();
// A count query will never be paged for the user, but we always page it internally to avoid OOM.
// If we user provided a pageSize we'll use that to page internally (because why not), otherwise we use our default
if (parameters.isCount && pageSize <= 0)
pageSize = DEFAULT_COUNT_PAGE_SIZE;
if (pageSize <= 0 || command == null || !QueryPagers.mayNeedPaging(command, pageSize))
{
return execute(command, cl, variables, limit, now);
}
else
{
QueryPager pager = QueryPagers.pager(command, cl, options.getPagingState());
if (parameters.isCount)
return pageCountQuery(pager, variables, pageSize, now);
List<Row> page = pager.fetchPage(pageSize);
ResultMessage.Rows msg = processResults(page, variables, limit, now);
if (!pager.isExhausted())
msg.result.metadata.setHasMorePages(pager.state());
return msg;
}
}